1.
0,5x+2y=1 /mnożymy obustronnie przez 2
2x-3y=1
x+4y=2 /mnożymy razy (-2)
-2x-8y=-4
--------------
-11y=-3
y= 3/11
x= 2-4y
x= 2- 4*3/11
x= 10/11
2.
(2x-3)^2+(3x+2)^2=
4x^2-12x+9+9x^2+12x+4=
13x^2+13= 13(x^2+1)
(4x-1)^3= 62x^3-32x^2+8x-1
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
1.
0,5x+2y=1 /mnożymy obustronnie przez 2
2x-3y=1
x+4y=2 /mnożymy razy (-2)
2x-3y=1
-2x-8y=-4
2x-3y=1
--------------
-11y=-3
y= 3/11
x= 2-4y
x= 2- 4*3/11
x= 10/11
y= 3/11
2.
(2x-3)^2+(3x+2)^2=
4x^2-12x+9+9x^2+12x+4=
13x^2+13= 13(x^2+1)
(4x-1)^3= 62x^3-32x^2+8x-1